<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link href="1.css" rel="stylesheet">
    <script src="2.js"></script>
</head>
<body>
<p id="pid"></p>
<p id="pid1"></p>
<p id="pid2"></p>
<input type="checkbox" name="test" value="1"/><span>1</span>
<input type="checkbox" name="test" value="2"/><span>2</span>
<input type="checkbox" name="test" value="3"/><span>3</span>
<input type="checkbox" name="test" value="4"/><span>4</span>
<input type="checkbox" name="test" value="5"/><span>5</span>
<input type="checkbox" name="test" value="6"/><span>6</span>
<input type="checkbox" name="test" value="7"/><span>7</span>
<input type="checkbox" name="test" value="8"/><span>8</span>
<input type="checkbox" name="test" value="9"/><span>9</span>
<input type="checkbox" name="test" value="10"/><span>10</span>
<br>
<button id="btn1">开始</button>
<button id="btn2">重新开始</button>
</body>
</html>